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| Mirrors > Home > MPE Home > Th. List > vsnid | Structured version Visualization version GIF version | ||
| Description: A setvar variable is a member of its singleton. (Contributed by David A. Wheeler, 8-Dec-2018.) |
| Ref | Expression |
|---|---|
| vsnid | ⊢ 𝑥 ∈ {𝑥} |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | vex 3457 | . 2 ⊢ 𝑥 ∈ V | |
| 2 | 1 | snid 4626 | 1 ⊢ 𝑥 ∈ {𝑥} |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ∈ wcel 2145 {csn 4587 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-ext 2734 |
| This proof depends on definitions: df-bi 210 df-an 402 df-tru 1573 df-ex 1813 df-sb 2100 df-clab 2741 df-cleq 2754 df-clel 2837 df-v 3455 df-sn 4588 |
| This theorem is used by: exsnrex 4644 rext 5427 unipw 5429 xpdifid 6164 xpdifcnvepel 6165 opabiota 6964 fnressn 7158 fressnfv 7160 snnex 7760 frrlem12 8299 frrlem14 8301 mapsnd 8896 funen1cnv 9038 findcard2d 9164 ac6sfi 9257 iunfi 9313 elirrvOLDOLD 9574 kmlem2 10157 fin1a2lem10 10414 hsmexlem4 10434 iunfo 10550 modfsummodslem1 15881 lcmfunsnlem2lem1 16732 coprmprod 16755 coprmproddvdslem 16756 c0snmgmhm 20604 lbsextlem4 21349 frlmlbs 22011 coe1fzgsumdlem 22529 evl1gsumdlem 22582 maducoeval2 22863 dishaus 23608 dis2ndc 23687 dislly 23724 dissnlocfin 23756 comppfsc 23759 txdis 23859 txdis1cn 23862 txkgen 23879 isufil2 24135 alexsubALTlem4 24277 tmdgsum 24322 dscopn 24800 ovolfiniun 25730 volfiniun 25776 jensen 27223 uvtx01vtx 29843 cplgr1vlem 29875 unidifsnel 32996 gsumpart 33490 dflring3 33894 mplidomlem 34024 vieta 34077 extdg1id 34163 irngss 34184 esum2dlem 34589 bnj1498 35557 fineqvnttrclselem2 35635 wevgblacfn 35695 cvmlift2lem1 35868 funpartlem 36508 ttcid 37098 topdifinffinlem 38088 fvineqsneq 38153 pibt2 38158 finixpnum 38346 mbfresfi 38402 pclfinN 40760 sn-iotalem 43078 mzpcompact2lem 43583 dvmptfprod 46760 fourierdlem48 46969 sge0sup 47206 funressnvmo 47920 dfclnbgr6 48759 dfsclnbgr6 48761 termco 50394 termcarweu 50441 diag1f1o 50447 diag2f1o 50450 |
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